Ranked fifth among the Seven Great Monsters of the classic Sailor Moon anime, Rikoukeidar is a Dark Kingdom youma locked away in the Blue Rainbow Crystal. Her dormant form waits within Reika Nishimura until Zoisite pries the crystal loose and twists the woman into the monster.
A monocle sits over one of her yellow eyes, and her skin carries an olive-green cast. Her hair, colored yellow and red, runs along the right of her scalp and reaches as low as her upper back. Rounding out the look are magenta boots, a gold band on one arm, and a strapless leotard in indigo.
In combat she hurls vials that burst apart, and she wields a device called the Big Flask that lets her catch an oncoming strike and sling it back, as she does against Sailor Jupiter's Supreme Thunder. Once Fire Soul shatters the flask, her advantage in the fight is gone.

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Sealed within the Blue Rainbow Crystal, the youma lies reborn as Reika Nishimura, girlfriend of Motoki Furuhata. Episode 29 has Zoisite draw the crystal out and warp Reika into the monster. After Fire Soul breaks her flask, Sailor Moon turns Moon Healing Escalation on Reika, lifting the monstrous shape away from her. Endymion later tries to rouse the youma once more, penning Reika inside the Black Crystal during her time in Africa, yet no revival comes, since Sailor Mercury foils the plan.
Rikoukeidar is the fifth of the Seven Great Monsters in the classic Sailor Moon anime, a Dark Kingdom youma sealed within the Blue Rainbow Crystal and hosted by Reika Nishimura.
Rikoukeidar hurls exploding vials and wields a device called the Big Flask that catches an incoming attack and slings it back at her opponent, as she does against Sailor Jupiter's Supreme Thunder.
Zoisite draws the Blue Rainbow Crystal out of Reika Nishimura and warps her into the youma Rikoukeidar in episode 29 of the anime.
After Sailor Mars's Fire Soul shatters her Big Flask, Sailor Moon uses Moon Healing Escalation on Reika Nishimura, lifting the monstrous form away from her for good.
Endymion later tries to revive the youma by sealing Reika Nishimura inside the Black Crystal during her time in Africa, but the revival fails after Sailor Mercury foils the plan.
Looking for more on Rikoukeidar? The Sailor Moon Wiki on Fandom has a dedicated page with community notes.
View on FandomThis content is original writing by Daddy Jim Headquarters based on the Sailor Moon anime series, manga, and official materials. Sailor Moon was created by Naoko Takeuchi, published by Kodansha, and animated by Toei Animation. All rights to Sailor Moon and its characters belong to their respective owners. Episode and chapter references are cited where applicable.
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